Inner cap for a wig



FIG. 1 is a front view of an inner cap for a wig showing the claimed design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side view thereof. 

CLAIM The ornamental design for an inner cap for a wig, as shown and described. 